Political Divisions in U.S. Are Widening, Long-Lasting, Poll Shows

Divisions in America reach far beyond Washington into the nation’s culture, economy and social fabric, and the polarization began long before the rise of President Donald Trump, a new Wall Street Journal/NBC News survey of social trends has found.

The findings help explain why political divisions are now especially hard to bridge. People who identify with either party increasingly disagree not just on policy; they inhabit separate worlds of differing social and cultural values and even see their economic outlook through a...